Half of the villagers of a certain village have their own houses. One-fifth of the villagers cultivate paddy. One-third of the villagers are literate. Four-fifth of the villagers are below twenty-five. Then, which one of the following is certainly true?

1. (a)All the villagers who have their own houses are literate
2. (b)Some villagers under twenty-five are literate
3. (c)A quarter of the villagers who have their own houses cultivate paddy
4. (d)Half of the villagers who cultivate paddy are literate